(CNN) — Remee Lee was elated when she became pregnant, but those feelings quickly turned into a nightmare that won’t let go of her.

Her boyfriend wasn’t happy about the pregnancy, but it was Lee’s dream to have a child. Until her boyfriend, John Andrew Welden, took that dream away.

This week, Welden, 28, pleaded guilty to killing their unborn baby. How? He tricked Lee into taking an abortion pill, causing her to miscarry.

“Every day is a nightmare for me ever since this began,” Lee told CNN’s Chris Cuomo Tuesday. “Even hearing the guilty (plea) yesterday, it’s hard to believe it, it’s hard to read it and know that this actually happened to me.”

Guilty plea can’t take away pain

Lee, 26, was in the Florida courtroom Monday, dabbing away tears as her former boyfriend accepted a plea deal that could send him to prison for at least 13 years.

Welden was indicted under the rarely used federal Unborn Victims of Violence Act, a murder charge that carries a life sentence.